Crude, uncouth (6)
I believe the answer is:
vulgar
This clue is a double definition.
'crude' is the first definition.
(I know that crude can be written as vulgar)
'uncouth' is the second definition.
(I know that uncouth can be written as vulgar)
(Other definitions for vulgar that I've seen before include "Coarse, boorish" , "Indecent" , "Rude and coarse" , "Unrefined" , "Improper - fractions may be so described" .)